The Photocurrent Improvement of Inverted Polymer Solar Cells Using ZnPc to Extend Light Absorption Range

Author

Shen, Liang ; Xu, Yang ; Meng, Fanxu ; Ruan, Shengping ; Chen, Weiyou

Author_Institution

State Key Lab. on Integrated Optoelectron., Jilin Univ., Changchun, China

fYear

2011

fDate

16-18 May 2011

Firstpage

1

Lastpage

3

Abstract

We fabricated a novel solar cells with the structure of indium tin oxide (ITO)/ titanium dioxide (TiO₂)/ regioregular poly-(3-hexylthiophene)(RR-P3HT): [6,6]-phenyl C₆₀ butyric acid methyl ester (PCBM)/ zinc phthalocyanine (ZnPc)/ Molybdenum trioxide(MoO₃)/Ag. ZnPc, which is well known as a p type material, was evaporated on PCBM: P3HT layer after annealing. A bulk-heterojunction of P3HT: PCBM and a bilayer heterojunction of PCBM/ZnPc existed simultaneously. The performance of photovoltaic device with a thin ZnPc layer is dramatically improved compared with that without ZnPc. The photocurrent density is improved from 6.90mA/cm² to 8.31mA/cm², and the power conversion efficiency is also improved from 2.79% to 3.06% under Air Mass 1.5 Global (AM1.5G) illumination with the intensity of 100mW/cm² in ambient air.

Keywords

indium compounds; molybdenum compounds; organic semiconductors; photoconductivity; photoemission; polymers; power conversion; silver; solar cells; titanium compounds; ITO-TiO₂-MoO₃-Ag; [6,6]-phenyl C₆₀ butyric acid methyl ester; annealing; bilayer heterojunction; bulk heterojunction; efficiency 2.79 percent; efficiency 3.06 percent; inverted polymer solar cells; light absorption range; photocurrent density; photovoltaic device; power conversion efficiency; regioregular poly-(3-hexylthiophene); zinc phthalocyanine; Absorption; Heterojunctions; Lighting; Photovoltaic cells; Photovoltaic systems; Polymers;

fLanguage

English

Publisher

ieee

Conference_Titel

Photonics and Optoelectronics (SOPO), 2011 Symposium on

Conference_Location

Wuhan

ISSN

2156-8464

Print_ISBN

978-1-4244-6555-2

Type

conf

DOI

10.1109/SOPO.2011.5780502

Filename

5780502